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# database_sql.py
import os
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from models_sql import Base

# 优先读取环境变量中的 PostgreSQL 数据库连接,如果没有则使用 SQLite 降级方案
# 生产环境建议在 HF Spaces 的 Secrets 中配置 DATABASE_URL = postgresql://user:pass@host/dbname
SQLALCHEMY_DATABASE_URL = os.environ.get("DATABASE_URL", "sqlite:////tmp/comfy_financial.db")

# 如果是 SQLite,需要 check_same_thread=False
connect_args = {"check_same_thread": False} if "sqlite" in SQLALCHEMY_DATABASE_URL else {}

engine = create_engine(SQLALCHEMY_DATABASE_URL, connect_args=connect_args)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

def init_sql_db():
    # 启动时自动建表
    Base.metadata.create_all(bind=engine)

def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()